The most likely outcome of a “brokered” convention would be the guy (of the 4 still running) who is still first after a couple of ballots would be nominated for president, and the guy who is second or third who puts the guy in first over the top would be the VP. They are not going to go for someone who comes in with no delegates.
here it is, mathematically......... brokered convention=party bigwigs in the back room smoking cigars=mcromney as the nominee........